import "./style.less";
import { getStrFullLength, cutStrByFullLength } from "../_util/util";
import Input from "ant-design-vue/es/input";
const TextArea = Input.TextArea;

export default {
  name: "LimitTextArea",
  model: {
    prop: "value",
    event: "change"
  },
  props: Object.assign({}, TextArea.props, {
    prefixCls: {
      type: String,
      default: "ant-textarea-limit"
    },
    // eslint-disable-next-line
    value: {
      type: String
    },
    limit: {
      type: Number,
      default: 200
    }
  }),
  data() {
    return {
      currentLimit: 0
    };
  },
  watch: {
    value(val) {
      this.calcLimitNum(val);
    }
  },
  created() {
    this.calcLimitNum(this.value);
  },
  methods: {
    handleChange(e) {
      const value = e.target.value;
      const len = getStrFullLength(value);
      if (len <= this.limit) {
        this.currentLimit = len;
        this.$emit("change", value);
        return;
      } else {
        const str = cutStrByFullLength(value, this.limit);
        this.currentLimit = getStrFullLength(str);
        this.$emit("change", str);
      }
      console.error("limit out! currentLimit:", this.currentLimit);
    },
    calcLimitNum(val) {
      const len = getStrFullLength(val);
      this.currentLimit = len;
    }
  },
  render() {
    // eslint-disable-next-line no-unused-vars
    const { prefixCls, ...props } = this.$props;
    return (
      <div class={this.prefixCls}>
        <TextArea
          {...{ props }}
          value={this.value}
          onChange={this.handleChange}
        ></TextArea>
        <span class="limit">
          {this.currentLimit}/{this.limit}
        </span>
      </div>
    );
  }
};
